package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
//import jdk.jshell.Snippet;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.net.ssl.SSLEngineResult;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 前端传过来的密码进行m5加密， 然后和数据库的相比较
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
         return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO){
        Employee employee = new Employee();

        //将DTO类对象(只用来接受) 拷贝成 存储的形式
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置常量 规范
        employee.setStatus(StatusConstant.ENABLE);

        //注意点： 1.密码不会传过来  2，设置常量 规范  3.加密后是字符串 转换数组形式存储
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        // TODO 后期需要改为当前登录用户的ID
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select*from employee limit 0,10
        //startPage会动态得把limit接上 只需要往里面传页码和每页显示记录数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records);
    }

    /**
     * 员工分页查询
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id){
        //update employee set status=? where id =?

        /*
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        */

        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @return
     */
    public Employee getById(Long id){
      Employee employee  = employeeMapper.getById(id);
      //增强安全性 不让前端看到密码
      employee.setPassword("****");
      return employee;
    }


    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    public void update(EmployeeDTO employeeDTO) {
    //由于之前在xml里面写的update的数据类型是employee 所以要把dto转换成employee
    Employee employee = new Employee();
    BeanUtils.copyProperties(employeeDTO, employee);
//    employee.setUpdateTime(LocalDateTime.now());
//    //之前写的localThread  获取当前修改人的id
//    employee.setUpdateUser(BaseContext.getCurrentId());

    employeeMapper.update(employee);
    }
}
